Dedicated to sharing programmer-architect skills—Java backend, system, microservice, and distributed architectures—to help you become a senior architect.
Learn how to seamlessly convert uploaded .docx files to PDF in a Spring Boot application using the pure‑Java docx4j library, covering solution comparison, Maven dependencies, a utility class, controller implementation, and Windows/Linux font‑encoding fixes for reliable, high‑fidelity document rendering.
This article surveys common microservice design patterns—including decomposition, integration, event‑driven, cross‑cutting concerns, and observability—explaining their goals, trade‑offs, and practical implementation steps to help architects build scalable, resilient backend systems.
This comprehensive guide demystifies Git by explaining its distributed architecture, file states, commit nodes, HEAD, remote repositories, and essential commands for adding, committing, branching, merging, rebasing, cherry-picking, and reverting, empowering developers to confidently manage code history and collaborate effectively.
The article examines design patterns as a mid‑level code standard, explores why they often feel out of place in everyday business development, analyzes performance, class‑explosion, team skill, project environment, agile timing, and turnover issues, and offers concrete steps to maintain sustainable code quality.
This article explains how aspect‑oriented programming (AOP) addresses cross‑cutting concerns by defining joinpoint interfaces, describing their design, illustrating Java examples, and comparing static and dynamic weaving techniques used in frameworks like Spring.
This tutorial walks through the OSI model, explains TCP three‑way handshake and four‑way termination, compares TCP and UDP, addresses common TCP tuning questions, describes long versus short socket connections with heartbeats, and shows how to design a custom protocol and implement a reusable Socket connection pool in Node.js.
This article explains why multi‑way search trees such as B‑trees, B+‑trees, B*‑trees and R‑trees are crucial for reducing disk I/O in large‑scale storage systems, covering their hardware background, structural definitions, height analysis, insertion and deletion algorithms, and practical examples with code and diagrams.
This article compares token pass‑through, unified gateway authentication, Feign, Dubbo, Spring Boot Web + Dubbo, regular auth modules, and Kubernetes integration, explaining their pros, cons, and implementation details to help you choose the most suitable internal‑call pattern for microservices.
This article explains the principles of Single Sign-On (SSO) and OAuth2.0, compares their workflows, outlines the four OAuth2.0 grant types, and clarifies terminology differences, providing clear step‑by‑step diagrams and practical examples.
Amid rising demand for open‑source, self‑controlled databases in China, major firms such as Tencent, Alibaba, and Huawei have built PostgreSQL‑based distributed, cloud‑native solutions, citing PostgreSQL’s richer data types, native sequence support, extensible ecosystem, advanced monitoring, robust replication, and true open‑source licensing as decisive advantages over MySQL.
